Victoria, Shiyun and Gillian bought a souvenir for their niece. They shared the cost equally between them. Victoria used ²₅ of her savings, Shiyun used ¹₅ of her savings and Gillian used ³₈ of her savings. Victoria and Gillian had $399 left. How much did each girl pay for the souvenir?
The amount spent by each girl is the same.  Make the numerators the same.
LCM of 2, 1 and 3 = 6

2x35x3 of Victoria's savings = 1x65x6 of Shiyun's savings = 3x28x2 of Gillian savings
615 of Victoria's savings = 630 of Shiyun's savings = 616 of Gillian's savings

	Victoria	Shiyun	Gillian
Before	15 u	30 u	16 u
Change	- 6 u	- 6 u	- 6 u
After	9 u	24 u	10 u

Savings that Victoria had left
= 15 u - 6 u
= 9 u

Savings that Gillian had left
= 16 u - 6 u
= 10 u

Total savings that Victoria and Gillian had left
= 9 u + 10 u
= 19 u

19 u = 399

1 u = 399 ÷ 19 = 21

Amount that each girl paid
= 6 u
= 6 x 21
= $126

Answer(s): $126